#include <stdio.h>
#include <unistd.h>
int main()
{

    printf("我是父进程,pid:%d,ppid:%d\n",getpid(),getppid());
    pid_t id = fork();

    if(id == 0)
    {
        while(1)
        {
            printf("我是子进程,pid:%d,ppid:%d\n",getpid(),getppid());
            sleep(2);
        }
    }
    else 
    {
        while(1)
        {
            printf("我是父进程,pid:%d,ppid:%d\n",getpid(),getppid());
            sleep(2);
        }
    }
    return 0;
}
